Multijets are a type of fuel injection system used in diesel engines that improve performance and fuel efficiency. There are several synonyms for multijets, including common rail system, direct injection, and electronic fuel injection. Common rail systems use a high-pressure pump to deliver fuel to a common rail, which then distributes fuel to the engine's fuel injectors. Direct injection systems inject fuel directly into the combustion chamber. Electronic fuel injection systems use sensors and computer-controlled mechanical systems to deliver fuel to the engine. Regardless of the system used, multijets are an efficient way to maximize diesel performance and fuel economy.